hard water stains

D.I.Y. Cleaner [Video]
D.I.Y. Cleaner [Video]
D.I.Y. Cleaner [Video]
Ok, if you have a pet then this has most likely happened. That icky, calcified hard water stains in your pet's water bowl. How do you get rid of it without using harmful chemicals? I was told Vinegar.  I'm taking on the challenge to see, "Does this work?"